10. Les Grossman in Tropic Thunder

If you can’t strap on a hairy fat suit, a bald cap and about $8.50 worth of terrible gold jewellery when you’re the biggest movie star in the world then when can you do it? Les Grossman in Tropic Thunder is the kind of balls-out, go-for-broke, this-could-end-my-career performance that made people briefly forget all the weird stuff that goes along with being Tom Cruise and just enjoy him having the time of his life. Miraculously, he managed to steal the attention in a film that also featured a blacked-up Robert Downey Jr.